perniciously
adv. 有害地；有毒地
近义词：insidiously，wickedly，evilly，spitefully，harmfully，destructively，ruinously，fatally，damagingly，banefully，
英英释义
Adverb
- in a harmfully insidious manner;
"these drugs act insidiously"
- in a noxiously baneful way;
"this banefully poisoned climate"